Kilotest: Diagnoses of negative text-indent violation by HTML element 1019 on Mozilla Foundation page

Here is how tools diagnose the negative text-indent issue for HTML element 1019 of the Mozilla Foundation page.

Basics

• About the negative text-indent issue
  • Why it matters: Helper may hide content from a user
  • Priority: high
  • Related WCAG standard: 4.1
• About the Mozilla Foundation page
  • URL: https://www.mozilla.org/en-US/
  • Tested on 2026-04-03 at 03:56
• About HTML element 1019
  • Take me there
  • Tag name: LI
  • Text: YouTube (@firefoxchannel)
  • Start tag: <li>
  • XPath: /html/body/div[2]/footer[1]/div[2]/div[1]/div[1]/div[3]/div[2]/ul[1]/li[3]
  • Bounding box: x = 1596, y = 7685, width = 24, height = 25

Diagnoses

1. CSS technique <code>text-indent: -9999px </code> is used to hide text. However, it causes problems for right-to-left language and also keep focus for screen reader outside of visible area.

   Tool: ASLint (eSSENTIAL Accessibility)

   Rule: incorrect_technique_for_hiding_content